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Yamaha 50 dirt bike ele start very weak spark crank more no spark

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  • Yamaha Master
  • 40,741 Answers

Hi Blossercj, you could have a faulty spark plug, spark plug cable, or ignition coil, Good luck and have a nice day.

Posted on Sep 27, 2015

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6 Suggested Answers

6ya6ya
  • 2 Answers

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Posted on Jan 02, 2017

  • 66 Answers

SOURCE: i have a 2004 ttr yamaha 225 dirt bike and theres no spark too p

check stator ac output 1st.check pulse coil next. find cdi box to try next.other possibles- ign coil, try unscrewing plug cap & trimming about 1/4" off coil wire. check spark w/ cap off. finally could be wiring.

Posted on Feb 16, 2009

  • 2 Answers

SOURCE: Yamaha 2001 Raptor 660, sat for a year, wont

Your gas is bad.  I have to change my all the time If your starter turns but dose not engage the starter barring is out DO NOT BUY STOCK. buy after market when you replace that.  they 

Posted on Mar 21, 2009

  • 3567 Answers

SOURCE: Our 2000 Yamaha TT-R125L engine won't fire. It is a kick start

Here are a few things to do >>
How old is the gas in the gas tank? Get fresh fuel.
Remove the water trap bowl at the bottom of the petcock, (gas valve). Any water or trash in the bowl? Drain a cup of gas from the tank. Is there any water or trash in the cup? Clean the bowl and filter screen if present, then re-mount them, ( not all bikes have a water trap bowl or screen ).

Install a new stock NGK spark plug and try to start the engine. If the bike doesn't start and run properly then shut off the gas and remove the carburetor from the engine.

Remove the float bowl and clean the entire carb with a spray carb cleaner from the auto parts store. Wear protective goggles to avoid getting spray in your eyes. Spray into all the little airways and fittings in the carb. Remove the two screws on the outside throat of the carb and spray into the screw holes as well.
< < READ CLOSELY > >
Be sure to put these two screws back in the same hole they came out of. IMPORTANT > do not tighten these two screws down. Only screw these in until they LIGHTLY seat. Now turn each screw one and one half turns outward. Put the rest of the carb back together, clean the air filter and install the carb. Let the float bowl fill then start the engine. Set the idle speed with the idle screw.


I am uncertain if the bike has ran for you or not. "Did pull the spark plug and kick started it." If the bike still will not run then the cam chain may be out of time. Why was the tensioner off the bike?

Please rate this solution. Thanks budx5!

Posted on Apr 04, 2009

  • 142 Answers

SOURCE: Yamaha 2001 Raptor 660, need to clean my carb

Drain and replace the gas with fresh.
Remove the air cleaner and spray carb cleaner into the inlet. Work your throttle a little then put everything back together and try to start it.

Posted on Jun 02, 2009

shadtremonky
  • 353 Answers

SOURCE: No Spark for Spark Plug on 1984 Honda XR80 Dirt Bike

has it been under water, check the kill switch

Posted on Jul 01, 2009

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2 Answers

Yamaha ttr90 no spark


Hi, Anonymous and the usual suspects are:
1. Fouled spark plugs.
2. Severely discharged or a damaged battery, should have 12.5 volts or better and be able to pass a load test if necessary.
3. Check battery terminals for damage or corrosion, check the battery cables at "BOTH" ends for loose, corroded, or broken connectors, "INSIDE" and outside the cable harness, perform connector wiggle test and check cables with an ohmmeter if necessary.
4. Loose connection at ignition coil or plug between ignition sensor and CDI box.
5. Spark plug cables in bad condition, shorting / leaking, spark plug cable connections loose, check for spark leakage in the dark.
6. Faulty ignition coil, pick up coil, trigger coil or CDI box testing needs to be checked with an ohmmeter at 70 degrees Fahrenheit
7. Faulty safety switches clutch, kickstand, neutral, off/on etc.
8. Faulty ignition switch.
For more information about your issue and valuable "FREE" downloads that you will need please click on the links below. Good luck and have a nice day.
TTR 90 no spark very weak spark what else should do TTR
How to fix No Spark Problem on Motorcycles and Dirt Bikes
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May 04, 2013 | 2005 Yamaha TTR 90 E

1 Answer

MY 1998 YZ 125 KEEPS FOULING PLUG AND THEN BOGS DOWN


Hi, Anonymous and the usual suspects are:
1. Fuel mixture too rich or enrichner left out too long.
2. Incorrect spark plugs for your kind of service.
3. Piston rings badly worn or broken.
4. Valve guides are badly worn and/or seals worn, crushed or have come off valve guide and pump oil through it.
5. Spark plug cable weak or ignition coil faulty.
For more information about your issue and valuable "FREE" downloads that you will need please click on the links below. Good luck and have a nice day.
Why Does My Dirt Bike Keep Fouling Spark Plugs
Fouling plugs in my yz 125
YAMAHA YZ125 Owner Service Manual
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http://mybikemanuals.com/yamaha/yamaha-yz-owners-manuals

Mar 18, 2013 | Yamaha YZ 125 Motorcycles

1 Answer

Intermittent spark when cranking dt 125 2006


if batteries ok then its bad connection, check all connections battery solenoid, starter and earth to frame

Feb 22, 2013 | 2006 Yamaha DT 125 RE

1 Answer

Yamaha 50 dirt bike weak spark


Hi Blossercj, for more information about your question please visit the website below. Good luck and have a nice day.
http://www.yamaha-motor.com/assets/service/manuals/2009/lit-11626-22-24_pw50_1574.pdf

Jan 04, 2013 | Yamaha XPeed 50 R Motorcycles

1 Answer

Weak spark on 1993 yz 125


Hi, Anonymous there is no such thing as a weak spark even though dozens of riders will swear that's what they have and are dying to show you, the bottom line is either you have spark or don't have spark there is no in between.
You won't see a dirtbike spark really well, and people only look at it when they have a problem. It is designed to fire under extreme pressure (13:1 compression) and is very robust, but it is not a 1mm bright blue line jumping across a spark plug. It can be white and very hard to see. If you are confident you have weak or no spark prove it by holding the plug in your hand and stark kicking you will be in for a "SHOCKING" surprise!!!!!
60% of these bikes have a flooding issue and/or a fouled plug. 30% need valves adjusted and most of the remaining 10% are something simple in the electrics like a broken kill switch, bad earth on the battery or dead battery, wiring at the steering head damaged or blown fuse.
For more information about your question and valuable "FREE" downloads that you will need please click on the blue links below. Good luck and have a wonderful day.
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Yamaha YZ125T1 Owner Service Manual
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http://mybikemanuals.com/yamaha/yamaha-yz-owners-manuals

Sep 07, 2012 | 2004 Yamaha YZ 125

1 Answer

I have a 2002 Yamaha YZ 426f that is incredibly hard to start.


Hi, Jacob and the usual suspects are:
1. Spark plugs in bad condition or have an improper gap or are partially fouled.
2. Spark plug cables in bad condition.
3. Battery damaged or nearly discharged, should have 12.5 volts.
4. Check battery terminals for damage or corrosion, check the battery cables at "BOTH" ends for loose, corroded, or broken connectors, "INSIDE" and outside the cable harness, perform connector wiggle test and check cables with an ohmmeter if necessary.
5. Throttle controls not adjusted correctly.
6. Water or dirt in the fuel system.
7. Water or dirt in the carburetor.
8. Intake air leak.
9. Fuel tank vent hose and vapor valve plugged, or fuel line closed off, restricting fuel flow.
10. Enricher valve inoperative.
11. Engine lubricant to heavy (winter operation).
12. Ignition is not functioning properly (possible sensor failure).
13. Faulty ignition coil.
14. Valves sticking.
For more information about your issue and valuable "FREE" downloads that you will need please visit the websites below. Good luck and have a nice day.
Dirt Rider Magazine
How to Start YZ426F Easily
Yamaha YZ426F Owner Service Manual
OEM parts for Yamaha
Yamaha YZ450F Owner Manual Page 3

May 03, 2012 | 2002 Yamaha YZ 426 F

1 Answer

2002 Yamaha WR250 Keeps fouling the spark plug. What are the possibilities and things to check? Thank you!


Hi, Lynnmcneely and the usual suspects are:
1. Fuel mixture too rich or enrichner left out too long.
2. Faulty spark plug.
3. Incorrect spark plug for the engine type or service.
4. Piston rings badly worn or broken.
5. Valve guides are badly worn and/or seals worn, crushed or have come off the valve guide and are pumping oil through it.
6. Spark plug cable weak or leaking check for spark jump in the dark.
7. Faulty ignition coil.
For more information about your issue and valuable "FREE" downloads that you will need please click on the blue links below. Good luck and have a wonderful day.
Why Does My Dirt Bike Keep Fouling Spark Plugs
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YAMAHA WR250F Owner Service Manual
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Sep 29, 2010 | 2003 Yamaha WR 250 F

1 Answer

TTR 600 2004 model won't start


Hi, Bancygelli and the usual suspects are:
1. Fouled spark plugs.
2. Severely discharged or a damaged battery should have 12.5 volts or more and be able to pass a proper "LOAD" test if necessary, you may have a preliminary reading of 12.5 volts or more but little or zero amperage the battery is faulty and must be replaced, AGM batteries fail in this scenario more so than lead acid batteries.
3. Check battery terminals for damage or corrosion, check the battery cables at "BOTH" ends for loose, corroded, or broken connectors, "INSIDE" and outside the cable harness, perform connector wiggle test and check cables with an ohmmeter if necessary.
4. Loose connection at ignition coil or plug between ignition sensor and module.
5. Spark plug cables in bad condition, shorting/leaking, spark plug cable connections loose check for spark leakage in the dark.
6. Faulty ignition coil or electronic control module.
7. Faulty CKP, CMP, or BAS sensor.
8. Faulty ignition switch.
9. Tilt sensor needs a reset.
10. Security alarm failing to disarm needs reset
For more information about your issue and valuable "FREE" downloads that you will need please click on the blue links below. Good luck and have a wonderful day.
What to Do Check When Dirt Bike Won Start
How to fix No Spark Problem on Motorcycles and Dirt Bikes
YAMAHA TT600R Service Manual
OEM parts for Yamaha
http://mybikemanuals.com/yamaha/yamaha-tt-owners-manuals

Apr 06, 2010 | 2000 Yamaha TT 600 R

2 Answers

Wont start


I had the same bike for 3 years and it wouldn't start when it was too cold outside under--about 33-37 degreese--it wont start.
---how cold is it where your trying to start it--

i know this bike like the back of my hand

you can email me @ workhorsemo@aol.com

Apr 24, 2009 | 2002 Yamaha TT-R 125

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